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INVESTIGATION ON POROUS OXYGEN ELECTRODE OF BRONZE WARE ACCELERATED CORROSION |
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郑州轻工业学院 |
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Abstract Cu-Sn-Pb alloy plated layer with appropriate porosity was used as the simulation sample of bronze ware.The effects of corrosion products such as cuprous chloride,copper chloride alkali and copper carbonic acid alkali on the depolarization reaction of oxygen were investigated by corrosion paste experiments and microelectrode method.The simulating corrosion cells were assembled with plated copper-tin-lead alloy electrode and porous oxygen electrode cathode polarization curves testing of porous oxygen electrode were carried out,and the constant current discharge and constant resistance discharge of oxygen electrode with cuprous chloride as active catalytic material were also carried out.
The result indicated that cuprous chloride made the corrosion speed of sample higher two orders of magnitude than bivalent copper salts,and it has the highest catalytic activation to the depolarization reaction of oxygen,the discharge performance
of oxygen electrode very stabilized and the production procees of copper chloride alkali which has been called the mostly component of “powdery rust” was simulated.The mechanism of porous oxygen electrode to accelerate pitting corrosion of bronze ware has been put forwarded.
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Received: 01 November 2005
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